Anonymous, working together with LulzSec and other hackers, has struck again. As a part of its Operation Antisec, Anonymous has released close to 400 megabytes of documents belonging to FBI contractor ManTech International. Ironically enough, ManTech proudly claims to specialize in tackling some of the most challenging cyber security problems facing our nation.

In the recent past, Anonymous and LulzSec have been actively targeted by law enforcement agencies around the world. FBI alone arrested 16 suspected Anonymous members earlier this month. In response, Anonymous has continued to strike high profile targets such as defense contractor Booz Allen Hamilton and NATO.

The documents leaked by Anonymous include everything from photographs to income statements and strategic plans. Last year FBI had outsourced its cyber security responsibilities to ManTech for $100 million. However, it’s not the sole federal agency that is served by ManTech. National Security Agency, U.S. Navy, Air Force, Army, Marine Corps, and Defense Intelligence Agency are some of the other esteemed clients of ManTech. In fact, an overwhelming proportion of the leaked documents pertain to NATO. ManTech was also possibly chosen because of its involvement in the planned smear campaign against WikiLeaks (dubbed Operation MetalGear), along with HBGary.

ManTech’s Official Response

It’s unclear exactly how much the recent spate of arrests has hurt Anonymous. Earlier this week, UK Police claimed to arrest Topiary, one of the major forces behind LulzSec. However, recent reports suggest that the law enforcement agencies might have been carefully and intentionally mislead into arresting the wrong person. However, one thing that is clear is that Anonymous doesn’t have any intention of giving up.

Pallab De is a blogger from India who has a soft spot for anything techie. He loves trying out new software and spends most of his day breaking and fixing his PC. Pallab loves participating in the social web; he has been active in technology forums since he was a teenager and is an active user of both twitter (@indyan) and facebook .